The Doctor Who Christmas special had plenty of surprises in store, not least of which was an appearance by the original TARDIS.

In this video – which features possible minor spoilers –  Steven Moffat, Mark Gatiss and some of the cast of the latest regeneration episode, Twice Upon a Time, get quite excited at being on the recreated original TARDIS set. While one of them doesn’t really get what all of the fuss is about…